To install MongoDB on your workstation, just follow these three simple steps:

1. Run the MongoDB MSI installer

For Windows 7, you want the version named "Windows 64-bit 2008 R2+" located here. For Windows 7 and Windows Server 2008 R2, it is also recommended that you install this hotfix from Microsoft dealing with memory-mapped files. More information is available here.

Choose the "Complete" setup option.

2. On your C: drive, create a folder called "data", and within that, another folder called "db"

For example, at the command prompt just enter:

C:\>mkdir c:\data\db

3. Tell MongoDB to run as a Windows Service

From a command prompt, set your current working directory to the folder where you just installed MongoDB. If you used the typical, default installation options, then the command would be:

C:\>cd "C:\Program Files\MongoDB\Server\3.0\bin"

Now that you are in the MongoDB "bin" folder, tell the Mongo "daemon" process (mongod) to install itself as a Windows Service: